81296720020

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{40245901}}^1$

素因数の和:40246011

約数の個数: 24

約数和(自身を含む): 172413444168

約数和(自身を除く): 91116724148

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 40245901, 80491802, 160983604, 201229505, 402459010, 804918020, 4064836001, 8129672002, 16259344004, 20324180005, 40648360010, 81296720020]

約数ペア:

[(1, 81296720020), (2, 40648360010), (4, 20324180005), (5, 16259344004), (10, 8129672002), (20, 4064836001), (101, 804918020), (202, 402459010), (404, 201229505), (505, 160983604), (1010, 80491802), (2020, 40245901)]